The Rise of Zenobia: Overlord, Book 1

My name is Zabdas: once a slave; now a warrior, grandfather and servant. I call Syria home. I shall tell you the story of my Zenobia: Warrior Queen of Palmyra, Protector of the East, Conqueror of Desert Lands.... The Roman Empire is close to collapse. Odenathus of Palmyra holds the Syrian frontier and its vital trade routes against Persian invasion. A client king in a forgotten land, starved of reinforcements, Odenathus calls upon an old friend, Julius, to face an older enemy: the Tanukh.